Current research projects

Image Verification of storage suitability of cryo tubes
Image Refrigerants, lubricants and mixtures
Image Laseroptical measurement
Image Test procedures for electrical components
Image Investigation of materials
Image Filter Tests
Image Development of a Cryogenic Magnetic Air Separation Unit
Image Characterisation of Superconductors in Hydrogen Atmosphere
Image Corrosion inhibitor for ammonia absorption systems
Image Micro fluidic expansion valve
Image Micro heat exchangers in refrigeration
Image Low noise and non metallic liquid-helium cryostat
Image Swirl-free on the move...
Image Pulse-Tube-Refrigerator with sealed compressor
Image Testing of mobile leak detectors according to DIN EN 14624
Image Low temperature – test facilities

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Calibration of Low Temperature Sensors

Industry and R&D

Dr. rer. nat. Matthias Schneider

+49-351-4081-5126

According to the comparative measurement method

Accurate and reliable measurements are the requirements for high-quality research and development or industrial production. Using the comparative measurement method the following sensors can be calibrated:

  • Resistance Temperature Detectors (RTD) with positive temperature coefficient (like Platinum or Rhodium-Iron RTDs)
  • RTD with negative temperature coefficient (like Germanium or Cernox™ RTDs)
  • Diode and thermocouples.

With an automatic measuring station several temperatures according to a sample point table will be adjusted. The calibration is carried out with secondary thermometers that are calibrated by an authority. Furthermore a fix point check with LHe or LN2 will be performed. In addition, a calbriated Cernox sensor is available for measurements in the low temperature range. The measuring facility allows the calibration of about 30 sensors at once. There are continuous extensions for different sensor types.

Parameter

IndicatorMinimalMaximal
Measuring range1.5 K350 K
Measuring accuracy5 mK (1.5 ... 4.2 K)50 mK (80 ... 350 K)
Sample dimensioncommon sensor packages
Sample preparationnot necessary

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Further Projects - Research and Development

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Liquefaction rates from 10 to 15 l/h

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Filter Tests

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Tribological studies at cryogenic temperatures

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